1. 01 Sep, 2012 1 commit
    • John Stultz's avatar
      time: Move ktime_t overflow checking into timespec_valid_strict · cee58483
      John Stultz authored
      Andreas Bombe reported that the added ktime_t overflow checking added to
      timespec_valid in commit 4e8b1452
       ("time: Improve sanity checking of
      timekeeping inputs") was causing problems with X.org because it caused
      timeouts larger then KTIME_T to be invalid.
      Previously, these large timeouts would be clamped to KTIME_MAX and would
      never expire, which is valid.
      This patch splits the ktime_t overflow checking into a new
      timespec_valid_strict function, and converts the timekeeping codes
      internal checking to use this more strict function.
      Reported-and-tested-by: default avatarAndreas Bombe <aeb@debian.org>
      Cc: Zhouping Liu <zliu@redhat.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Cc: Prarit Bhargava <prarit@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
  2. 31 Aug, 2012 3 commits
  3. 30 Aug, 2012 2 commits
    • Linus Torvalds's avatar
      Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux · 155e36d4
      Linus Torvalds authored
      Pull drm fixes from Dave Airlie:
       "A bunch of scattered fixes ati/intel/nouveau, couple of core ones,
        nothing too shocking or different."
      * 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
        gma500: Consider CRTC initially active.
        drm/radeon: fix dig encoder selection on DCE61
        drm/radeon: fix double free in radeon_gpu_reset
        drm/radeon: force dma32 to fix regression rs4xx,rs6xx,rs740
        drm/radeon: rework panel mode setup
        drm/radeon/atom: powergating fixes for DCE6
        drm/radeon/atom: rework DIG modesetting on DCE3+
        drm/radeon: don't disable plls that are in use by other crtcs
        drm/radeon: add proper checking of RESOLVE_BOX command for r600-r700
        drm/radeon: initialize tracked CS state
        drm/radeon: fix reading CB_COLORn_MASK from the CS
        drm/nvc0/copy: check PUNITS to determine which copy engines are disabled
        i915: Quirk no_lvds on Gigabyte GA-D525TUD ITX motherboard
        drm/i915: Use the correct size of the GTT for placing the per-process entries
        drm: Check for invalid cursor flags
        drm: Initialize object type when using DRM_MODE() macro
        drm/i915: fix color order for BGR formats on IVB
        drm/i915: fix wrong order of parameters in port checking functions
    • Heiko Carstens's avatar
      s390/32: Don't clobber personality flags on exec · 768fd073
      Heiko Carstens authored
      In native 32 bit mode the personality flags were not correctly inherited.
      This is the s390 version of 59e4c3a2
       "powerpc/32: Don't clobber personality
      flags on exec".
      Reported-by: default avatarMike Frysinger <vapier@gentoo.org>
      Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
      Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
  4. 29 Aug, 2012 20 commits
  5. 28 Aug, 2012 14 commits
    • Ben Skeggs's avatar
      drm/nvc0/copy: check PUNITS to determine which copy engines are disabled · 14f0458a
      Ben Skeggs authored
      On some Fermi chipsets (NVCE particularly) PCOPY1 doesn't exist.  And if
      what I've seen on Kepler is true of Fermi too, chipsets of the same type
      can have different PCOPY units available.
      This should fix a v3.5 regression reported by a number of people effecting
      suspend/resume on NVC8/NVCE chipsets.
      Cc: stable@vger.kernel.org [3.5]
      Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
    • Stefan Behrens's avatar
      Btrfs: fix that repair code is spuriously executed for transid failures · 256dd1bb
      Stefan Behrens authored
      If verify_parent_transid() fails for all mirrors, the current code
      calls repair_io_failure() anyway which means:
      - that the disk block is rewritten without repairing anything and
      - that a kernel log message is printed which misleadingly claims
        that a read error was corrected.
      This is an example:
      parent transid verify failed on 615015833600 wanted 110423 found 110424
      parent transid verify failed on 615015833600 wanted 110423 found 110424
      btrfs read error corrected: ino 1 off 615015833600 (dev /dev/...)
      It is wrong to ignore the results from verify_parent_transid() and to
      call repair_eb_io_failure() when the verification of the transids failed.
      This commit fixes the issue.
      Signed-off-by: default avatarStefan Behrens <sbehrens@giantdisaster.de>
      Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    • Liu Bo's avatar
      Btrfs: fix ordered extent leak when failing to start a transaction · d280e5be
      Liu Bo authored
      We cannot just return error before freeing ordered extent and releasing reserved
      space when we fail to start a transacion.
      Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
      Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    • Liu Bo's avatar
      Btrfs: fix a dio write regression · 24c03fa5
      Liu Bo authored
      This bug is introduced by commit 3b8bde746f6f9bd36a9f05f5f3b6e334318176a9
      (Btrfs: lock extents as we map them in DIO).
      In dio write, we should unlock the section which we didn't do IO on in case that
      we fall back to buffered write.  But we need to not only unlock the section
      but also cleanup reserved space for the section.
      This bug was found while running xfstests 133, with this 133 no longer complains.
      Signed-off-by: default avatarLiu Bo <bo.li.liu@oracle.com>
      Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    • Josef Bacik's avatar
      Btrfs: fix deadlock with freeze and sync V2 · bd7de2c9
      Josef Bacik authored
      We can deadlock with freeze right now because we unconditionally start a
      transaction in our ->sync_fs() call.  To fix this just check and see if we
      have a running transaction to commit.  This saves us from the deadlock
      because at this point we'll have the umount sem for the sb so we're safe
      from freezes coming in after we've done our check.  With this patch the
      freeze xfstests no longer deadlocks.  Thanks,
      Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
      Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    • Stefan Behrens's avatar
      Btrfs: revert checksum error statistic which can cause a BUG() · 5ee0844d
      Stefan Behrens authored
      Commit 442a4f63
       added btrfs device
      statistic counters for detected IO and checksum errors to Linux 3.5.
      The statistic part that counts checksum errors in
      end_bio_extent_readpage() can cause a BUG() in a subfunction:
      "kernel BUG at fs/btrfs/volumes.c:3762!"
      That part is reverted with the current patch.
      However, the counting of checksum errors in the scrub context remains
      active, and the counting of detected IO errors (read, write or flush
      errors) in all contexts remains active.
      Cc: stable <stable@vger.kernel.org> # 3.5
      Signed-off-by: default avatarStefan Behrens <sbehrens@giantdisaster.de>
      Signed-off-by: default avatarChris Mason <chris.mason@oracle.com>
    • Stefan Behrens's avatar
      Btrfs: remove superblock writing after fatal error · 68ce9682
      Stefan Behrens authored
      With commit acce952b
      , btrfs was changed to flag the filesystem with
      BTRFS_SUPER_FLAG_ERROR and switch to read-only mode after a fatal
      error happened like a write I/O errors of all mirrors.
      In such situations, on unmount, the superblock is written in
      btrfs_error_commit_super(). This is done with the intention to be able
      to evaluate the error flag on the next mount. A warning is printed
      in this case during the next mount and the log tree is ignored.
      The issue is that it is possible that the superblock points to a root
      that was not written (due to write I/O errors).
      The result is that the filesystem cannot be mounted. btrfsck also does
      not start and all the other btrfs-progs tools fail to start as well.
      However, mount -o recovery is working well and does the right things
      to recover the filesystem (i.e., don't use the log root, clear the
      free space cache and use the next mountable root that is stored in the
      root backup array).
      This patch removes the writing of the superblock when
      BTRFS_SUPER_FLAG_ERROR is set, and removes the handling of the error
      flag in the mount function.
      These lines can be used to reproduce the issue (using /dev/sdm):
      echo 0 25165824 linear $SCRATCH_DEV 0 | dmsetup create foo
      ls -alLF /dev/mapper/foo
      mkfs.btrfs /dev/mapper/foo
      mount /dev/mapper/foo $SCRATCH_MNT
      echo bar > $SCRATCH_MNT/foo
      echo 0 25165824 error | dmsetup reload foo
      dmsetup resume foo
      ls -alF $SCRATCH_MNT
      touch $SCRATCH_MNT/1
      ls -alF $SCRATCH_MNT
      sleep 35
      echo 0 25165824 linear $SCRATCH_DEV 0 | dmsetup reload foo
      dmsetup resume foo
      sleep 1
      umount $SCRATCH_MNT
      btrfsck /dev/mapper/foo
      dmsetup remove foo
      Signed-off-by: default avatarStefan Behrens <sbehrens@giantdisaster.de>
      Signed-off-by: default avatarJan Schmidt <list.btrfs@jan-o-sch.net>
    • Josef Bacik's avatar
      Btrfs: allow delayed refs to be merged · ae1e206b
      Josef Bacik authored
      Daniel Blueman reported a bug with fio+balance on a ramdisk setup.
      Basically what happens is the balance relocates a tree block which will drop
      the implicit refs for all of its children and adds a full backref.  Once the
      block is relocated we have to add the implicit refs back, so when we cow the
      block again we add the implicit refs for its children back.  The problem
      comes when the original drop ref doesn't get run before we add the implicit
      refs back.  The delayed ref stuff will specifically prefer ADD operations
      over DROP to keep us from freeing up an extent that will have references to
      it, so we try to add the implicit ref before it is actually removed and we
      panic.  This worked fine before because the add would have just canceled the
      drop out and we would have been fine.  But the backref walking work needs to
      be able to freeze the delayed ref stuff in time so we have this ever
      increasing sequence number that gets attached to all new delayed ref updates
      which makes us not merge refs and we run into this issue.
      So to fix this we need to merge delayed refs.  So everytime we run a
      clustered ref we need to try and merge all of its delayed refs.  The backref
      walking stuff locks the delayed ref head before processing, so if we have it
      locked we are safe to merge any refs inside of the sequence number.  If
      there is no sequence number we can merge all refs.  Doing this not only
      fixes our bug but keeps the delayed ref code from adding and removing
      useless refs and batching together multiple refs into one search instead of
      one search per delayed ref, which will really help our commit times.  I ran
      this with Daniels test and 276 and I haven't seen any problems.  Thanks,
      Reported-by: default avatarDaniel J Blueman <daniel@quora.org>
      Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
    • Josef Bacik's avatar
      Btrfs: fix enospc problems when deleting a subvol · 5a24e84c
      Josef Bacik authored
      Subvol delete is a special kind of awful where we use the global reserve to
      cover the ENOSPC requirements.  The problem is once we're done removing
      everything we do a btrfs_update_inode(), which by default will try to do the
      delayed update stuff which will use it's own reserve.  There will be no
      space in this reserve and we'll return ENOSPC.  So instead use
      btrfs_update_inode_fallback() which will just fallback to updating the inode
      item in the case of enospc.  This is fine because the global reserve covers
      the space requirements for this.  With this patch I can now delete a subvol
      on a problem image Dave Sterba sent me.  Thanks,
      Reported-by: default avatarDavid Sterba <dave@jikos.cz>
      Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
      Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
    • Miao Xie's avatar
      Btrfs: fix wrong mtime and ctime when creating snapshots · c0f62ded
      Miao Xie authored
      When we created a new snapshot, the mtime and ctime of its parent directory
      were not updated. Fix it.
      Signed-off-by: default avatarMiao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
    • Arne Jansen's avatar
      Btrfs: fix race in run_clustered_refs · 22cd2e7d
      Arne Jansen authored
      With commit
      commit d1270cd9
      Author: Arne Jansen <sensille@gmx.net>
      Date:   Tue Sep 13 15:16:43 2011 +0200
           Btrfs: put back delayed refs that are too new
      I added a window where the delayed_ref's head->ref_mod code can diverge
      from the sum of the remaining refs, because we release the head->mutex
      in the middle. This leads to btrfs_lookup_extent_info returning wrong
      numbers. This patch fixes this by adjusting the head's ref_mod with each
      delayed ref we run.
      Signed-off-by: default avatarArne Jansen <sensille@gmx.net>
      Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
    • Chris Mason's avatar
      Btrfs: don't run __tree_mod_log_free_eb on leaves · b12a3b1e
      Chris Mason authored
      When we split a leaf, we may end up inserting a new root on top of that
      leaf.  The reflog code was incorrectly assuming the old root was always
      a node.  This makes sure we skip over leaves.
      Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
    • Josef Bacik's avatar
      Btrfs: increase the size of the free space cache · 6fc823b1
      Josef Bacik authored
      Arne was complaining about the space cache having mismatching generation
      numbers when debugging a deadlock.  This is because we can run out of space
      in our preallocated range for our space cache if you have a pretty
      fragmented amount of space in your pinned space.  So just increase the
      amount of space we preallocate for space cache so we can be sure to have
      enough space.  This will only really affect data ranges since their the only
      chunks that end up larger than 256MB.  Thanks,
      Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>
      Signed-off-by: default avatarChris Mason <chris.mason@fusionio.com>
    • Josef Bacik's avatar
      Btrfs: barrier before waitqueue_active · 66657b31
      Josef Bacik authored
      We need a barrir before calling waitqueue_active otherwise we will miss
      wakeups.  So in places that do atomic_dec(); then atomic_read() use
      atomic_dec_return() which imply a memory barrier (see memory-barriers.txt)
      and then add an explicit memory barrier everywhere else that need them.
      Signed-off-by: default avatarJosef Bacik <jbacik@fusionio.com>